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  <title>Class: Spec::Expectations::Differs::Default</title>
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    <div id="classHeader">
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          <td><strong>Class</strong></td>
          <td class="class-name-in-header">Spec::Expectations::Differs::Default</td>
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            <td><strong>In:</strong></td>
            <td>
                <a href="../../../../files/vendor/plugins/rspec/lib/spec/expectations/differs/default_rb.html">
                vendor/plugins/rspec/lib/spec/expectations/differs/default.rb
                </a>
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            <td><strong>Parent:</strong></td>
            <td>
                <a href="../../../Object.html">
                Object
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    <div id="description">
      <p>
TODO add some rdoc
</p>

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    <div id="method-list">
      <h3 class="section-bar">Methods</h3>

      <div class="name-list">
      <a href="#M000018">diff_as_object</a>&nbsp;&nbsp;
      <a href="#M000017">diff_as_string</a>&nbsp;&nbsp;
      <a href="#M000016">new</a>&nbsp;&nbsp;
      </div>
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      <h3 class="section-bar">Public Class methods</h3>

      <div id="method-M000016" class="method-detail">
        <a name="M000016"></a>

        <div class="method-heading">
          <a href="#M000016" class="method-signature">
          <span class="method-name">new</span><span class="method-args">(format=:unified,context_lines=nil,colour=nil)</span>
          </a>
        </div>
      
        <div class="method-description">
          <p><a class="source-toggle" href="#"
            onclick="toggleCode('M000016-source');return false;">[Source]</a></p>
          <div class="method-source-code" id="M000016-source">
<pre>
    <span class="ruby-comment cmt"># File vendor/plugins/rspec/lib/spec/expectations/differs/default.rb, line 15</span>
15:         <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">format</span>=<span class="ruby-identifier">:unified</span>,<span class="ruby-identifier">context_lines</span>=<span class="ruby-keyword kw">nil</span>,<span class="ruby-identifier">colour</span>=<span class="ruby-keyword kw">nil</span>)
16: 
17:           <span class="ruby-identifier">context_lines</span> <span class="ruby-operator">||=</span> <span class="ruby-value">3</span>
18:           <span class="ruby-identifier">colour</span>        <span class="ruby-operator">||=</span> <span class="ruby-keyword kw">false</span>
19: 
20:           <span class="ruby-ivar">@format</span>,<span class="ruby-ivar">@context_lines</span>,<span class="ruby-ivar">@colour</span> = <span class="ruby-identifier">format</span>,<span class="ruby-identifier">context_lines</span>,<span class="ruby-identifier">colour</span>
21:         <span class="ruby-keyword kw">end</span>
</pre>
          </div>
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      <h3 class="section-bar">Public Instance methods</h3>

      <div id="method-M000018" class="method-detail">
        <a name="M000018"></a>

        <div class="method-heading">
          <a href="#M000018" class="method-signature">
          <span class="method-name">diff_as_object</span><span class="method-args">(target,expected)</span>
          </a>
        </div>
      
        <div class="method-description">
          <p><a class="source-toggle" href="#"
            onclick="toggleCode('M000018-source');return false;">[Source]</a></p>
          <div class="method-source-code" id="M000018-source">
<pre>
    <span class="ruby-comment cmt"># File vendor/plugins/rspec/lib/spec/expectations/differs/default.rb, line 55</span>
55:         <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">diff_as_object</span>(<span class="ruby-identifier">target</span>,<span class="ruby-identifier">expected</span>)
56:           <span class="ruby-identifier">diff_as_string</span>(<span class="ruby-constant">PP</span>.<span class="ruby-identifier">pp</span>(<span class="ruby-identifier">target</span>,<span class="ruby-value str">&quot;&quot;</span>), <span class="ruby-constant">PP</span>.<span class="ruby-identifier">pp</span>(<span class="ruby-identifier">expected</span>,<span class="ruby-value str">&quot;&quot;</span>))
57:         <span class="ruby-keyword kw">end</span>
</pre>
          </div>
        </div>
      </div>

      <div id="method-M000017" class="method-detail">
        <a name="M000017"></a>

        <div class="method-heading">
          <a href="#M000017" class="method-signature">
          <span class="method-name">diff_as_string</span><span class="method-args">(data_old, data_new)</span>
          </a>
        </div>
      
        <div class="method-description">
          <p>
This is snagged from diff/lcs/ldiff.rb (which is a commandline tool)
</p>
          <p><a class="source-toggle" href="#"
            onclick="toggleCode('M000017-source');return false;">[Source]</a></p>
          <div class="method-source-code" id="M000017-source">
<pre>
    <span class="ruby-comment cmt"># File vendor/plugins/rspec/lib/spec/expectations/differs/default.rb, line 24</span>
24:         <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">diff_as_string</span>(<span class="ruby-identifier">data_old</span>, <span class="ruby-identifier">data_new</span>)
25:           <span class="ruby-identifier">data_old</span> = <span class="ruby-identifier">data_old</span>.<span class="ruby-identifier">split</span>(<span class="ruby-regexp re">/\n/</span>).<span class="ruby-identifier">map!</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">e</span><span class="ruby-operator">|</span> <span class="ruby-identifier">e</span>.<span class="ruby-identifier">chomp</span> }
26:           <span class="ruby-identifier">data_new</span> = <span class="ruby-identifier">data_new</span>.<span class="ruby-identifier">split</span>(<span class="ruby-regexp re">/\n/</span>).<span class="ruby-identifier">map!</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">e</span><span class="ruby-operator">|</span> <span class="ruby-identifier">e</span>.<span class="ruby-identifier">chomp</span> }
27:           <span class="ruby-identifier">output</span> = <span class="ruby-value str">&quot;&quot;</span>
28:           <span class="ruby-identifier">diffs</span> = <span class="ruby-constant">Diff</span><span class="ruby-operator">::</span><span class="ruby-constant">LCS</span>.<span class="ruby-identifier">diff</span>(<span class="ruby-identifier">data_old</span>, <span class="ruby-identifier">data_new</span>)
29:           <span class="ruby-keyword kw">return</span> <span class="ruby-identifier">output</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">diffs</span>.<span class="ruby-identifier">empty?</span>
30:           <span class="ruby-identifier">oldhunk</span> = <span class="ruby-identifier">hunk</span> = <span class="ruby-keyword kw">nil</span>  
31:           <span class="ruby-identifier">file_length_difference</span> = <span class="ruby-value">0</span>
32:           <span class="ruby-identifier">diffs</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">piece</span><span class="ruby-operator">|</span>
33:             <span class="ruby-keyword kw">begin</span>
34:               <span class="ruby-identifier">hunk</span> = <span class="ruby-constant">Diff</span><span class="ruby-operator">::</span><span class="ruby-constant">LCS</span><span class="ruby-operator">::</span><span class="ruby-constant">Hunk</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">data_old</span>, <span class="ruby-identifier">data_new</span>, <span class="ruby-identifier">piece</span>, <span class="ruby-ivar">@context_lines</span>,
35:                                          <span class="ruby-identifier">file_length_difference</span>)
36:               <span class="ruby-identifier">file_length_difference</span> = <span class="ruby-identifier">hunk</span>.<span class="ruby-identifier">file_length_difference</span>      
37:               <span class="ruby-keyword kw">next</span> <span class="ruby-keyword kw">unless</span> <span class="ruby-identifier">oldhunk</span>      
38:               <span class="ruby-comment cmt"># Hunks may overlap, which is why we need to be careful when our</span>
39:               <span class="ruby-comment cmt"># diff includes lines of context. Otherwise, we might print</span>
40:               <span class="ruby-comment cmt"># redundant lines.</span>
41:               <span class="ruby-keyword kw">if</span> (<span class="ruby-ivar">@context_lines</span> <span class="ruby-operator">&gt;</span> <span class="ruby-value">0</span>) <span class="ruby-keyword kw">and</span> <span class="ruby-identifier">hunk</span>.<span class="ruby-identifier">overlaps?</span>(<span class="ruby-identifier">oldhunk</span>)
42:                 <span class="ruby-identifier">hunk</span>.<span class="ruby-identifier">unshift</span>(<span class="ruby-identifier">oldhunk</span>)
43:               <span class="ruby-keyword kw">else</span>
44:                 <span class="ruby-identifier">output</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">oldhunk</span>.<span class="ruby-identifier">diff</span>(<span class="ruby-ivar">@format</span>)
45:               <span class="ruby-keyword kw">end</span>
46:             <span class="ruby-keyword kw">ensure</span>
47:               <span class="ruby-identifier">oldhunk</span> = <span class="ruby-identifier">hunk</span>
48:               <span class="ruby-identifier">output</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-value str">&quot;\n&quot;</span>
49:             <span class="ruby-keyword kw">end</span>
50:           <span class="ruby-keyword kw">end</span>  
51:           <span class="ruby-comment cmt">#Handle the last remaining hunk</span>
52:           <span class="ruby-identifier">output</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">oldhunk</span>.<span class="ruby-identifier">diff</span>(<span class="ruby-ivar">@format</span>) <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-value str">&quot;\n&quot;</span>
53:         <span class="ruby-keyword kw">end</span>
</pre>
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